"Right," she confirmed, giving one of those sage nods. It ended up looking a bit funny on someone as silly as Tara, but nevermind that.
"When Rose opened the console and looked into my heart," she began, saying it a bit quieter than she'd been speaking before. Because as much as people thought she was crazy, she didn't want the entire world to know it. "I poured my power, the power of the Time Vortex into her to save my Doctor." She smiled fondly at the thought of her Ninth Doctor. So brave to sacrifice himself for a human.
She continued after a moment. "Rose's human mind was fused with mine," she pointed to her temple. "And she brought you back to life through me. Her choice." Tara gave him a bit of a serious look. "It went beyond everything I know to be right in Time and Space. And I'm sorry that it happened to you, Jack."